From b03142782c84c3ce6ba0a86a3af93c08b84f32e6 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Thu, 14 Nov 2013 21:37:05 +0100
Subject: [PATCH] Issue #19437: Fix parse_envlist() of the posix/nt module,
 don't call PyMapping_Values() with an exception set, exit immediatly on
 error.

---
 Modules/posixmodule.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 5e5f35520c..7e6bdc8879 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -5083,8 +5083,10 @@ parse_envlist(PyObject* env, Py_ssize_t *envc_ptr)
     }
     envc = 0;
     keys = PyMapping_Keys(env);
+    if (!keys)
+        goto error;
     vals = PyMapping_Values(env);
-    if (!keys || !vals)
+    if (!vals)
         goto error;
     if (!PyList_Check(keys) || !PyList_Check(vals)) {
         PyErr_Format(PyExc_TypeError,
-- 
2.50.0